Locomotive boiler



May .14, 1929. c; G. HAWLEY LOCOMOTIVE BOILER Filed Oct. 1924 2 Sheets-Sheet May '14, 1929. c. G. HAWLEY 5 LOCOMOTIVE BOILER Filed Oct. 5, 1924 2 Shets-Sheet 2 Patented May 14, 1929.

l llTED STATES PATENT OFFICE.

ctnannns GILBERT I-IAW'LEY, or onicaoo, inLinois, ASSIGNOR ro nocontorrvn FIRE- norr ooraranr, or oirroAeo, ILLINOIS, A CORPORATION or DELAWARE.

LoooMo'rrvE 1301mm.

Application filed October 3, 1924. Serial No. 741,311.

This invention relates to improvements in locomotive boilers and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

'llhe prii'nary object of the invention is to provide a simple and elhcient means in a locomotive boiler and preferably at or substantially in the t 'ansverse plane of the front throat or water leg thereof, to direct the cooler boiler water at thebottom of the boiler into said front water leg and then into the side legs of the boiler where it is rapidlyheated and caused to rise vertically infull contact with the side sheet and crown sheet of the firebox and this without commingling with the cooler water circulating or moving aft toaid the firebox.

A further object of the invention isto proride in the boiler a means which directs the flow or movement of the cooler boiler water into predetern'iiued courses which leads to the more e'l'licient water heating surfaces of the boiler so that a definite path of circulation is established fore and aft of the boiler, which the water must follow so that there will be no quiet or stagnant areas which will permit concentration ot such agents inthe boiler water that tend to pitting or corrosion of sheets and flues.

Another object of the invention is to pro vide in the boiler water space, a means which will insure equalization of boiler water temperature by causing active circulation there of, so that stresses and strains on boiler structure which induces checks and cracks are eliminated.

Tllhese objects of the invention, as well as others, together with the many advantages thereof, will more fully appear as I proceed with my specification.

ln the drawings:

l i 1 is a view in side elevation of the firebox end of a locomotive boiler, with part of the wrapper sheet shown as broken away to more clearly illustrate the invention.

Fig. 2 is a transverse section through the firebox end of a locomotive boiler embodying my invention, as taken on the line 22 of Fig. 1.

Fig. 3 is a horizontal sectional view through the boiler, as taken on the line 3-3 of Fig. 1.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawings :1. indicates as a whole the shell or wrapper of the boiler and 2 indicates the firebox thereof. The firebox includes the two side sheets 3-3 which merge into the transversely rounded crown sheet l and which extendsfrom the rear sheet 5 to the line sheet (3. To the flue sheet 6 are connected the usual flues 7 and at the bottom of said flue sheet is an inside throat sheet 8.

The shell of the boiler comprises the outer side sheets 9, a top sheet 10, a boilerwrapper 11 and front and rearouter throat sheets 12 and 13.

The various sheets of the boiler are suitably stayed in any familiar manner and provide the usualqfront and rear water legs 14; and 15 and side water legs ill-16 which are closed at their bottom ends by a mud ring 17. Of course, in the bottom of the firebox is the usual grate, not shown. The structure above described is typical of a locomotive boiler and is by way of illustration only.

In some locomotive boilers of the kind above described, due not only to certain limi rations and restrictions in design and arrangement of parts, as well as for other reasons, the circulation of water necessary to replace that evaporated by the firebox is notsufiicient to prevent quiet or still areas so that. certain elements or agents in the boiler water become deposited therein and induces corrosion of the boiler parts at these areas.

the cost of maintenance of the boiler.

To eliminate the objections to such boiler conditions I provide in the boiler water space a simple and ellicient means to direct the flow of the cooler boiler water into the front water leg and from there to the side water legs where it is rapidly heated. Instead of permitting the water in the side legs, as it is heated, to intermingle with that part of the boiler water just above the throat, I confine the same so that it will travel directly upwardly in the side legs until it reaches the crown sheet, where it mixes with the hotter boiler water at this point and moves forwardly. During this rapid heating, some of the water is evaporated into steam and in the forward movement of the water, it gives up its heat so that it descends toward the bottom of the boiler under the tubes.

' Inn the embodiment of thesinvention, as

space and preferabliy at the junction ofthe side water legs an the boiler space above the front water le gelongated' right and left hand, vertically -most convenient to secure said plates to the boiler shell and for that reason each plate-has a flange 19 which is secured to the shell by ,rivets or welding in a plane preferablyrin ad-;. .vance of the planeiof the flue sheet. Said plates mayv be inclinedtinwardly and rearvwardly toward the: corner or;-junction of the I is spaced a, short distance from the firebox. This spacing isnot flllql gh to permit a; :major circulation of boiler water between 20 said corner parts of. the firebox and. said ,flue'sheet 6 and side. sheets 3zofthefirebox 2V and the tree-orunflangededgeaofieach plate sheets.

, gp'lates hutisjust suflicient sothat the, edge thereof will not engage and abrade. or rub thereonin-such relativemovement as may occur -between them ,andwide enough tokeep platesterminate, insubstantially. the plane of clear of such scale. ,The top ends .of said the top ,of the :fireboxycrown sheet, and the free margin of ,each plate 18, maybe formed ,on. an; are or curve corresponding to that of. said crown sheet, I while the bottom endof each plate extends substantially into the plane of thefront water leg.

, above the top in contact withrtheeefiicientlheating and,

' It is thus a-pparent that the structure herein described, causes the boiler water; in. the

Saidwater rises; in the as it cannot flow or.- move forward because of said baffle iplatese untilitrises into a, plane ,oftthe same, it is maintained evaploratin surfaces of the firebox until it was es or floods overthe crown sheet. This boiler waterthen: flowsforward, itstemperature being reduced ;as' the front ends of, the, v tubes are reached when it settles toward the bottom of the boilerand flows rearwardly to .replacethe water directedinwardly intoiand heatedand evaporated in the side. waterilegs lot the boiler. circulation is; imparted to the boiler water fore and after ofthe boiler and this continuvousand active circulation not onlyi-equalizes the temperature of. the entire body. of water Thus a'continuous andaetive isposed plates 'l818-,-or I what may be termed baflle plates. I findit substantially t Jbutinsures against the forming of any quiet herein illustrated I interpose in the-boiler or-still areasbefore mentioned.

It is believed that from the foregoing the many advantages thereof will be readil apparent to those familiar with the-art an it is to be understood that'the description of the formation, location and arrangement of the parts are given as illustrations, only, and is .not intended for the purpose of limitation except as may be pointed out in the appended claims.

Lclaim: 1. In combination with alocomotive boiler shell and its selfcontained firebox separated ,by the usual water leg spaces, bafile plates car- -ried bylone ofthe first named elements and extending toward but being free from engagement with the other of the first mentioned elements for substantially closing oll communication between the top portion of said side water. legs and the forward boiler space. "2. In combination with a locomotive boiler shell and its self contained firebox separated by the usual water legspaces, baflle plates carried by the boiler shell and extending toward but being free from en agement with the firebox and substantially (:Iosing oil communication between the top portion of said side water legs and the forward boiler space.

3. In combination with a locomotive boiler I shell and its self contained firebox separated by the usual water leg spaces, a vertical baflie positioned at the front end ofeach side water leg and terminating at its bottom at a point above the bottom of said leg and terminating at its top substantially in the plane of the top of thecrown sheet said baflie being fixed along one margin to the boiler shell and being arranged with its other margin extending toward but spaced from the firebox.

4. In combination with a locomotive boiler shell and its self contained firebox separated by theusual water leg spaces, a vertical baflle vpositioned iii-each front water leg and extending diagonally thereof, said baille terminating at its bottom at a point above the bottom of said ie and terminating at its top in Ire plane of the crown sheet of the firebox said baflle being fixed along one margin to the boiler shell and being arranged with its'other margin extending toward but spaced from the firebox.

In testimony-whereof, I have hereunto set my hand," this 23 day .of September, 1924.

. CHARLES.GILBER'IHAWLEY. 

